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Railways PYQCBT 1 2016

RRB NTPC · Question 61

The simple interest at y% for ‘y’ years will be Rs. y on a sum. Find the principal amount.

  1. 100/y

  2. 100 × y

  3. 100 × y^2

  4. 100/y^2

Show answer & explanation

Answer: (A) 100/y

Explanation

SI = P × R × T/100, so y = P × y × y/100. Solving gives P = 100/y.